Mixed phosphorus anhydrides and phosphorus amides of 6-amino-penicillanic acid

ABSTRACT

Novel 6-APA, 7-ACA, and 7-ADCA derivatives are described which comprise phosphorylated derivatives of 6-APA, 7-ACA, or 7-ADCA and the corresponding acylated derivatives thereof. The novel compounds are prepared by the reaction of 6-APA, 7-ACA, 7-ADCA or a salt thereof with a phosphorus halide in the presence of an acid acceptor and subsequently acylating the thus formed phosphorylated compound, to form a phosphorylated acylated derivative which upon hydrolysis with water splits off the protective group(s) to provide the corresponding semi-snythetic penicillin or cephalosporin having useful antibacterial activity.

United States Patent 1191 Sellstedt v[ 1 Jan. 7,1975

[ 1 MIXED PHOSPI-IORUS ANHYDRIDES AND PH OSPHORUS AMIDES OF 6-AMINO-PENICILLANIC ACID [75] Inventor: John H. Sellstedt, King of Prussia,

[73] Assignee: American Home Products Corporation, New York, N.Y. 221 Filed: Nov. 9, 1971 21 Appl. No.: 197,142

7 [52] US. Cl 260/306.7 E, 260/239.1,

260/306.7 C [51] Int. Cl C07d 91/18 [58] Field of Search 260/239.l,306.7 E

[56] References Cited UNITED STATES PATENTS 11/1953 Young 260/461 5/1974 Ishimaru 260/243 C OTHER PUBLICATIONS Anderson et 211., J. Am. Chemical Society, Vol. 74. pp. 53045 306, (1952).

Anderson et al., J. Am. Chemical Society, Vol. 74, pp. 53074309, (1952).

Young et al, J. Am. Chemical Society. Vol. 78. pp. 2126-2131, (1956).

Primary ExaminerDonald G. Daus Assistant E.\'aminerJose Tovar [57] ABSTRACT Novel 6 -APA, 7ACA, and 7-ADCA derivatives are described which comprise phosphorylated derivatives 9 of 6-APA, 7-ACA, or 7-ADCA and the correspond- 3 Claims, No Drawings MIXED PHOSPHORUS ANHYDRIDES AND PHOSPHORUS AMIDES OF 6-AMINO-PENICILLA1SLQ ACID This invention relates to novel phosphorylated 6-APA, 7-ACA, and 7-ADCA derivatives, acylated derivatives thereof and the process for their production.

One aspect of the present invention relates to the production of semi-synthetic penicillins and cephalosporins in high yields from compounds such as 6-amino penicillanic acid, 7-amino cephalosporanic acid, and 7-amino'3-desacetoxy cephalosporanic acid.

Aanother aspect of the present invention relates to the acylation of novel phosphorylated 6-a mino penicillanic acids, 7-amino cephalosporanic acids, and 7- amino-3-desacetoxy cephalosporanic acids in the absence of an acid acceptor.

Yet another aspect of the present invention relates to novel acylated and phosphorylated derivatives of 6- amino penicillanic acid, 7-aminocephalosporanic acid,

7-amino-3-desacetoxy cephalosporanic acid and re-- lated compounds.

These and other aspects of the present invention will become apparent from the following description.

In its broadest aspects the present invention covers compounds having the following structure:

R is a member selected from the class consisting of hydrogen and an organic acyl radical; R is selected from the class consisting of hydrogen and a radical of the formula /X t U (Him or x wherein X is selected from the class consisting of oxygen, CH

and sulfur; m is an interger from 1 to 6; R is hydrogen or (lower)alkyl. The preferred novel compounds of the present invcntion are those having the following formulae:

R on:

and

and

P; ao u... with the proviso that R and R are not both hydrogen; R is selected from the class consisting of hydrogen and acetoxy.

The term (lower)alkyl as employed herein alone or i'n'conjunction with other designated groups is intended to encompass straight chain or branch chain alkyl groups consisting of from one through six carbon atoms (e.g. methyl, ethyl, propyl, butyl, isobutyl, hexyl, Z-ethylpropyl, etc.)

The term halogen as used herein is intended to encompass chlorine, bromine, iodine and fluorine. The term aryl encompasses monocyclic and bicyclic rings having six to ten ring carbon atoms such as phenyl,

naphthyl, etc, 'The term -aryl(lower) alkyl is illustrated by benzyl, phenethyl, etc.

The term (lower)alkanoyloxy" is illustrated by acetoxy, propionoyloxy and butanolyloxy. The term quaternary ammonium is illustrated by pyridinium, quinolinium, picolinum, etcLThe term tertiary amine is illustrated by any of the well-known radicals such as triethylamine, tribenzylamine, N-ethylpiperidine which NH2 R R i I HII I I Cke-e wherein:

)alkoxy;

R is selected from the class consisting of hydrogen,

(lower)alkyl and phenyl;

R and R are selected from the class consisting of hydrogen and halogen; R and R are selected from the class consisting of 'hydrogen, halogen, (lower)alkyl, (lower)alkoxy, 5 phenyl and phenoxy; I

a is an interger from to l; b is an interger from 0 through c is an interger from 0 through 2; d is an interger from 1 through 3, with the proviso that when a is 0, d is greater than 1, and when a is l, d is less than 3.

Semi-synthetic penicillins and cephalosporins may be prepared according to the following flow diagrams, using 6-APA and 7-ACA respectively, as illustrative starting materials.

15 In the foregoing process the starting material (e.g. 6-APA, 7-ACA or 7-ADCA) which may be obtained by any number of procedures described in the art (e.g. See US. 'Pat. No. 3,499,909 and 2,941,995) is reacted with a phosphorus halide of formula II in the presence of inertorganic solvent and an acid acceptor to form a compound of formula III or VI] respectively. This reaction is preferably carried out at a temperature above -l0 C. and not higher than about C. The molar ratio of an acid binding agent to a starting material such 25 as 6-APA is about 0.75:2 and the molar ratio of acid bindingagent to a compound of formula II is 1:1.

DIAGRAM A acid acceptor solvent mole) (2 moles) III I lAcylating agent anion I S CH3 f s on, 1 1 i s CH3 I AeylN Z hydrolysis R P N. CHII E l I l 11 0d N OH W P-R 0= N l 0 P- e V W IV(a) DIAGRAM B H' N S II II{ S I acid acceptor W F halogen--P-R O O N CHzO-(iJ-CH; Solvent O N (J W CHz--O-- -CH3 O=( J-OH l 1P5 I (1 mole) (2 moles) O: I

VI 11 VII lacylating agent III Ii" A 1 S\ I S W i O hydrolysis Ay1 N O 0 N t l 0 IL cmoc om- N CHI (F 0 R5 L I o: 1011 o-l orr,

O= -O-P-R6 Suitable acid binding agents are tertiary amines such as triethyl amine, dimethylaniline, quinoline, pyridine, lutidine, alkali metal carbonates; alkaline earth carbonates or other acid binding agents known in the art. The preferred acid binding agent is a strong tertiary amine. As used herein strong amines are those characterized by having dissociation constants in the range of from to 10 or having comparable basicity, as distinguished from weak amines which are characterized by having dissociation constants in the range of from 10 to 10*. A wide range of anhydrous non-hydroxylic organic solvents are useful in the reaction of 6-APA or 7-ACA with a phosphorylating agent including hydrocarbons such as benzene and toluene; chlorinated solvents such as methylene chloride, chloroform and chlorobenzene; ethers such as diethyl ether, dioxane, tetrahydrofuran; and other conventional solvents such as methylisobutylketone, dimethylformamide, ethyl acetate, acetonitrile, etc.

The reaction between 6-APA, 7-ACA, or 7ADCA and a phosphorus halide is carried out preferably at a temperature at which the reaction proceeds to completion in a reasonably short time period, i.e. between l0 C. and +10 C.

A compound of formula III and VII prepared according to this invention can be isolated by removing the hydrohalide base by filtration and distillation of the solvent, or if the intermediate is to be converted at once to a penicillin or cephalosporin, the reaction mixture can be acylated directly without filtration or concentration.

The product or products obtained from the reaction of a compound of formula .I or V1 with a phosphorylating agent is dependent on the molar ratio of the reactants as to whether an anhydride of the penicillanic acid is formed. Thus, if the molar ratio of a compound of formula II to formula I is greater than 1:1, the predominant material obtained is a compound of formula III, particularly as the molar ratio increases to about 2:1 and higher. On the other hand where the molar ratio is 1:1 or less (e.g. 0.511), the predominant compound is with the amount of a compound of formula III becoming smaller as the molar ratio of a compound of formula II is decreased in relation to the amount of 6-APA.

The preferred molar ratio of phosphorylating agent to the starting material such as a compound of formula I or VI is greater than 1:1, preferably at least 2:1.

The fact that mixtures of phosphorylated compounds can be produced under certain reaction conditions does not interfere with the process of acylation and subsequent formation of the desired semi-synthetic penicillin or cephalosporin.

Novel phosphorylated acylated compounds within the scope of formula A and B may be prepared by the acylation of a compound of formula III or VII in accordance with the reaction sequence shown above in diagrams A and B, respectively.

Suitable acylating agents include carboxylic acid halides, carboxylic acid anhydrides, mixed anhydrides with other carboxylic or inorganic acids; esters such as thiol esters and phenol esters; lactones; and carboxylic acids with carbodiimides or N,N- carboxyldiimidazoles.

Illustrative of some specific preferred acylating agents are phenoxyacetyl chloride, 2,6-

dimethoxybenzoyl chloride, benzene sulfonyl chloride, 2-phenoxypropionyl chloride, Z-phenoxy-butyl chloride, D(-)phenylglycyl chloride HCI, l-aminocyclopentane-carboxylic acid chloride HCl, l-aminocyclohexanecarboxylic acid chloride I-ICl, 2-amino-2- caroxyindane acid chloride HCl, 2-ethoxy naphthoyl bromide and 3-(2,6-dichlorophenyl)-5-methylisoxazole carbonyl chloride, etc.

In carrying out the acylation step, it has been surprisingly found that an acid acceptor need not be present during the reaction. Heretofore such a reagent was deemed essential for successfully carrying out the acylation procedure as illustrated by US. Pat. Nos. 3,595,855; 3,249,622. In addition, where a strong amine is used in reacting a compound of formula I with a compound of formula II, it is desirable to avoid the presence of any excess strong amine because the strong amine has a deleterious effect on the yield of semisynthetic penicillin produced. The acylation process is carried out in the presence of an inert anhydrous organic solvent. Suitable solvents may be the same as earlier exemplified for the reaction producing the phosphorylated derivatives of 6APA,' 7-ACA, 7-ADCA,

etc.

' The acylated penicillins and cephalosporins of formulae IV and IX are readily hydrolyzed by treating with water, to split off the protective group from the amino group and the carboxyl group to form a semisynthetic penicillin or cephalosporin embraced by formulae V and X, respectively.

The acylation of a compound of formula III or VII first results in the formation of an intermediate of formula IV(a) or VIII, respectively. These intermediates repidly convert to a compound of formula IV and IX, respectively as a result of expulsion of from the nitrogen atom. This expulsion is due to the presence of an anion (e.g. Cl) upon formation of the In the latter case hydrolysis of a compound of formula IV(a) or VIII, respectively, would result in direct formation of a compound of formula V or X, rather than intermediate IV or IX.

The hydrolysis is carried'out at a pH between 0.5 and 2 at a temperature below about 15, preferably between 0 and 5 C. The hydrolysis is carried out by treatment with water.

Where the acylating agent used is in the form of an acid addition salt, the penicillin or cephalosporin of formula V or X is recovered upon hydrolysis as an acid addition salt (e.g. chloride) which may then be converted to the free base by methods well known in the art. In the event the ultimate penicillin to be obtained is a-aminobenzyl penicillin (ampicillin), it has been found advantageous to change the chloride to an aryl sulfonic acid salt of the aminopenicillin either by adding an appropriate sulfonic acid to the reaction mixture comprising the selected organic solvent and water, or to the aqueous extracts separated as described immediately above. In this connection, a 25% excess of the sulfonic acid has been used to advantage in preparing the corresponding salt of ampicillin.

The aryl sulfonic salt of the a-aminobenzyl penicilin may then be converted to the penicillin per se by reaction with a base such as triethylamine or diethylamine in approximately 85% isopropanol. In the case of ampicillin specifically, the sulfonic acid salt, wet with water and ethyl acetate, may be added to isopropanol containing a molar equivalent of tr'iethylamine at 7580C., whereby the anhydrous form of ampicillin described and claimed in U.S. Pat. No. 3,144,445 is formed and collected by filtration from the hot mixture. 1

Alternatively, the corresponding penicillin may be obtained, but in hydrated form, by raising the pH of the aqueous reaction mixture containing the hydrochloride salt of said penicillin to the iso-electric point;

The starting materials defined by formula II may be prepared by procedures described in the literature. For example, the preparation of 2-chloro-1,3,2-dioxaphospholane is described by Lucas et al., J. Am. Chem. Soc, 72, 5491-5497 (1950). Other compounds within the scope of formula [I may be prepared by the procedures described by Brown et al., J. Chem. Soc. 878-881 (1970).

The following examples are given by way of illustration and are not to be construed as limitations of this invention.

9 EXAMPLE 1 D(-)a-aminobenzylpenicillin 6-Aminopenicillanic acid (10.81 g, 0.05 mole) is stirred for 16 hr. in 100 ml. of dichloromethane at 5 C. containing 13.85 ml. of triethylamine. At 05 C., a solution of 12.65 g. (0.1 mole) of 2-chloro-l,3,2 dioxaphospholane in 50 ml. of dichloromethane is added over 1 hr., and the mixture is stirred an additional 76 hr. at 05 C. The resulting product is 6-(1,3,2-dioxaphospholan-2-yl amino) penicillanic acid, 1,3 ,2-dioxaphospholan-2-yl ester. D-(- )phenylglycyl chloride hydrochloride (10.63 g., 0.05 mole) is added to the stirred mixture over 2 min., and stirring is continued for r hr. at 05 C. under nitrogen. The cooling bath is removed and the temperature is allowed to go to 17 C. and held at this temperature for a total acylation time of 3 hr. The resulting acylated product is 6-(2-amino-2 -phenylacetamido)penicillanic acid, l,3,2-dioxaphosphalan-2-yl ester. The mixture is poured into 300 ml. of water at 05 C. and stirred for min., with the pH going to 0.7. Celite is added, the mixture is filtered, and the filtrate is separated and the water layer (340 ml.) is bioassayed vs. S. Lutea. The addition of 5 ml. of this solution to'245 ml. of 1% pH 6 buffer gives an assay value of 700 'y/ml. of ampicillin.

The B-naphthalene sulfonic acid salt is prepared from the 340 ml. of solution by adding ethyl acetate (40 ml.) and cooling to 0-l0 C. followed by addition of 29.4

g. of a 37, 68% solution of B-naphthalene sulfonic acid over 10 min. and holding the pH at 1.5 to 1.7 with the addition of 5N sodium hydroxide. This mixture is stirred overnight at 5 (filtered, stirred in 60 ml. of ethyl acetate for 5 min., filtered and sucked dry, giving 27.3 g. the B-naphthalene sulfonic acid salt of D()aaminobenzylpenicillin. It was bioassayed vs. S. Lutea indicating the presence of 560 y/mg. of ampicillin.

EXAMPLE 2 l-aminocyclohexane penicillin 6-Aminopenicillanic acid (43.25 g., 0.7 mole) is stirred in dichloromethane (400 ml.) containing triethylamine (55.6 ml., 0.4 mole) at room temperature until solution is complete. The temperature is lowered to 05 C., and 50.6 g. (0.4 mole) 2-chloro-1,3 2-dioxophospholane in 200 ml. of dichloromethane is added over 1 hr., and stirring is continued at 05 C. for 15 hr. 1-aminocyclohexanecarboxylic acid chloride hydrochloride (40 g., 0.2 mole) is added, and the mixture is stirred while the internal temperature is allowed to slowly go to 10 C. over hr., and the reaction is continued for an additional 2% hr. at 10 C. The mixture is poured into 200 ml. of cold (05 C.) water and the mixture is stirred in an ice bath for 15 min. Isopropanol (160 ml.) and celite (15 g.) are added, the mixture is filtered by suction, and the cake is washed with 40 ml. of isopropanol. The two-phase filtrate is poured into a 2 liter round bottom 3-ne'ck flask, and while stirring at 1520 C., the pH is raised to 5.4-5.5 with 5N NaOH, giving white crystals of dihydrate of the above titled compound.

EXAMPLE 3 D(- )-oz-aminobenzylpenicillin 6-Aminopenicillanic acid (43.25 g., 0.2 mole) is stirred in dichloromethane (400 ml.) containing triethylamine (55.6 ml., 0.4 mole) at room temperature until solution is complete. The temperature is lowered to 05 C., and 50.6 g. (0.4 mole) 2-chloro-l, 3,2-dioxophospholane in 200 ml. of dichloromethane is added over 1 hr., and continue to stir at 05 C. for r hr. D(- )Phenylglycyl chloride hydrochloride (43.6 g., 0.2 mole) is added over about 1 min., and the mixture is stirred at 05 C. for '74 hr. The ice bath is lowered so that only the lower 1-2 cm. of the flask is in the ice water, and the internal temperature is allowed to slowly (about 25 min.) go to 10 C., and then held at this point for a total temperature raising time and reaction time of 2 hr. The mixture is poured into 800 ml. of room temperature water, and the flask is rinsed with 200 ml.

of water. The mixture is stirred with the vessel in an icebath for 15 min., Super Cel is added, the mixture is filtered by suction, and the cake is washed with 200 ml. water. The layers are separated, and the aqueous phase is placed in a 2 liter round bottom flask containing 200 m1. ethyl acetate. The internal temperature is lowered to 010 C. and the pH is adjusted to 2 by the addition of 5N sodium hydroxide. Then ml. of a 37.7% B-naphthalenc sulfonic acid solution is added in about 10 minutes while keeping the pH at 1.5 to 1.7 with 5N. NaOH. After stirring 6 hr. at 05 C., and no stirring for 12 hr., the mixture is filtered, and the cake is washed with about 100 ml. of cold pH 2 water. After sucking as dry as possible the cake is stirred in 250 ml. of ethyl acetate for 5 minutes, the mixture is filtered,

and the cake is washed with 2 X 50 ml. ethyl acetate, giving 137 g. of the above titled product. A portion of the sample is dried indicating 53.5% NVM with a corresponding yield of 66%, but bioassay vs. S. Lutea indicates 380 'y/mg. with a corresponding yield of 75%. This material is converted to anhydrous ampicillin in 80% yield by the standard isopropanol/triethylamine procedure as described in U.S. Pat. No. 3,487,073.

EXAMPLE 4 D(-)-oz-aminobenzylcephalosporin In a manner similar to the process for preparation of ampicillin in Example 1, but using 7-amino-cephalosporanic acid (54.6 g., 0.2 mole) instead of 6- aminopenicillanic acid, D(-) a-aminobenzylcephalosporin is isolated by adjusting the pH of the aqueous phase, obtained after filtration, to about 5.75.

EXAMPLE 5 naphthalene sulfonic acid salt of D(-)-a-aminobenzylpenicillin 6-Aminopenicillanic acid (21.7 g., 0.1 mole) is stirred in dichloromethane (200 ml.) at 05 C., and 14.0 ml. (0.1 mole) of triethylamine is added, and the mixture is stirred for 1 hr. At 0-5 C., a solution is dripped in of 2-chloro-1 ,3,2-dioxophopholane (12.7 g., 0.1 mole) in dichloromethane (100 ml.) over a 1 hr. period and stirring is continued at 0-5 C. for k hr. D-(-)-phenylglycyl chloride hydrochloride (21.3 g., 0.1 mole) is added all at once and the mixture is stirred at 05? C. for 30 min. The ice bath is lowered so that only the lower 1-2 cm. of the flask is in the ice water, and the internal temperature is allowed to slowly go to 10 C. over about 2 hr., and the mixture is poured into 450 ml. of room temperature water, and the flask is rinsed with 60 ml. of water. The mixture is stirred with the vessel in an ice bath for min., Super Cell is added, the mixture is filtered by suction, and the cake is washed with 100 ml. of water. The layers are separated,

and the aqueous phase is placed in a 1 liter round bottom flask containing 100 ml. of ethylacetate. The internal temperature is lowered to 0-l0 C. and the pH is raised to 2 by the addition of 5N NaOH. Then 60 g. of a 37% B-naphthalene sulfonic acid solution is added within 5 to 10 min. while keeping the pH at 1.5 to 1.7 with 5N NaOH. After stirring overnight at 0-5 C., the mixture is filtered, and the cake is washed with cold pH2 water (30 ml.). After sucking as dry as possible the cake is stirred in 125 ml. of ethyl acetate for 5 min., the mixture is filtered, and the cake washed twice with ethyl acetate, giving 38.2g. of the B-naphthalene sulfonic acid salt of D()-a-aminobenzylpenicillin. A portion of the sample is dried indicating the presence of 6.36 of NVM, with a corresponding 44% yield of the above titled product.

EXAMPLE 6 Following the procedure of Example 1, a series of phosphorylated penicillin compounds are prepared by reacting 2 moles of a phosphorylating agent with-one mole of 6-APA to produce a compound of formula D.

Following the procedure of Example 4, a series of phosphorylated penicillin compounds are prepared by reacting 2 moles of a phosphorylating agent of formula C with one mole of 7-ACA or 7-ADCA to produce a compound of formula E.

Following the procedure of Example 1, a series of phosphorylated penicillin compounds are prepared by reacting 0.5 mole of a phosphorylating agent of formula C with one mole of 6-APA to produce a compound of formula F.

--Continued & f s CH3 RPX RPN--X/ I OH: 5 \|l R51 3.9;. 3." my

(e) 02H. c2115 01 C2H5 c2115 0 0 or o EXAMPLE 9 Following the procedure of Example 4 a series of phosphorylated cephalosporin compounds are prepared by reacting 0.5 mole of a phosphorylating agent of formula C with one mole of 7-ACA or 7-ADCA to produce a compound of formula G.

l I H s R -PX R -P-N- o i; CH;R2

0=COH R5" 361 X R2! R? (a).. CH3 CH3 Cl H CH3 CH3 (b) o Br H o o/ 0 (v) H 1)..;. 0111. CH2 01 0 on CH2.

Odom 40 EXAMPLE 10 Following the procedure of Example 1, the following acylating agents are used in place of D(-)phenyl glycine chloride hydrochloride to obtain the following acylated phosphorylated penicillin derivatives. Those having an amino group are obtained as the hydrochloride salt.

. I i S CH3 RN- om o N i Acylating agent V Hydrochloride salt of NH: O l-aminocyclopentane ll earboxylie acid --C chloride.

Hydrochloride salt of I NH: O 1-nminocyclo-2- 1]: hcxcne-lcarhoxylic ucid chloride.

Hydrochloride salt of NH:

l-umiuo-l-indane cnrboxylic acid 0 chloride. (ll) -(ontinucd ll C113 Aeylating agent.

Hydrochloride salt of 1-amino-1,2,3,4- tctrahydronaphthoic acid chloride.

Hydrochloride sult of 1-amln0-7-ethoxy- 1,2,3,4tetrahydro-1 naphthoic acid ll chloride.

O C H2C H3 margarine. salt '0. NHz

Z-amlno-Z-indane carboxylic acid 0 chloride. II

Hydrochloride salt of 2-amino-1-phenoxy-2 indane carboxylic acid chloride. NH2 0 ll C- Hydrochloride salt of 1-amin0-1,2,3,4-tetrahydro-3,6'dlmeth yll-naphthoic acid chloride.

3-(pheny1)-5-methyl-4- isoxazolecarbonyl chloride.

3-(2,6-dichlorophenyl c1 5-rnethyl-4-is0xazole- I carbonyl chloride. I

if C I 2,6-din1ethoxy-benzoie acid chloride. 1

Z-ethoxyJ-naphthoyl chloridcf a-lhcnoxy butyric acid chloride.

EXAMPLE 11 capsules, and the like, utilizing conventional solvents, suspensoids, excipients, and the like. These compounds may be administered orally or parenterally. Naturally, the dosage of these compounds will vary somewhat with the form of administration and the particular compound chosen. Further, it will vary with the particular subject under treatment.

Following the procedure of Example 4, the acylating agents identified below are used to obtain the following acylated phosphorylated cephalosporins. Those having the amino group are obtained as the hydrochloride salt.

l What is claimed is: IP l l. A compound having the formula:

l 0:-N CIhR- S on: o 1 1 r rfi cn3 ():CO-l R--PN F R6 Aeylating agent R R2 wherein: D(- h;n 1 1 mtt o rt R and R are selected from the class consisting of 33133311; Q L (lower)alkyl, phenyl, naphthyl, phenyl(lower)alkyl s ut and naphthyl(lower)alkyl; and R and R when v joined together with phosphorous form the ring Z-Lhivnylncutiu avid... 0 1I\I/ X l I! l cnto- I L or D i .1 ,1 t O 0 n\ v ifilfii, iiyiiiii X x chloride. orr-o 0-0-4311, V r A 7 wherein: I Phemxyacem acid 0 O X 18 selected from the class consisting of oxygen CH chloride. ll 0 H CH and sulfur;

OOH2C a v R is selected from the class consisting of hydrogen and (lower)alkyl; and m is an integer from 1 to 6.

2. A compound which is: It is to be undertood that the only limitation on the H CH acyl radical of the synthetic penicillins and cephalospo- I /S I 3 rins is that they be essentially non-toxic upon in vitro E or in vivo application. O N

The synthetic penicillins and cephalosporins preg :l pared from the intermediates of the present invention v have activity against gram positive and/or gram negative bacteria and may be utilized in pharmacological 3. A compound according to claim 1 wherein R and compositions in association with pharmacologically ac- 40 R are joined together to fonn said ring with said phosceptable carrier, e.g. in suitable injectable forms, inphorus atom and wherein X is oxygen and m is l. eluding solutions and suspensions; or orally as tablets, ,t 

1. A COMPOUND HAVING THE FORMULA:
 2. A compound which is:
 3. A compound according to claim 1 wherein R5 and R6 are joined together to form said ring with said phosphorus atom and wherein X is oxygen and m is
 1. 